In order to improve the mechanical properties of diecasting az91 alloy, plastic forming is employed 1, and temperature plays a. Microstructure and mechanical properties in an az31. The electrochemical corrosion behaviour of a magnesium carbonate conversion layercoated az31 magnesium alloy was evaluated in simulated body fluid sbf solution. Microwaveassisted magnesium phosphate coating on the. Other designations that are equivalent to magnesium az31b alloy include. The microstructure of the ascast az31 alloy strip consists of columnar zones from the surface to midthickness region and equiaxed zones in the midthickness region.
Chemical composition physical properties mechanical properties thermal properties other designations introduction. Sealing of anodized magnesium alloy az31 with mgal layered. Magnesium, the eighth most abundant metal on earth, has seen an increase in applications in a variety of sectors ranging from aerospace, military, defense, and automotive to commercial mobile phones, sporting goods and handheld tools, owing to its high strengthtoweight ratio, machinability, thermal conductivity and weldability. This chapter introduces a novel, chemicalfree steam coating method for preparing films on magnesium mg alloys and assesses their effectiveness in improving the corrosion resistance of two different mg alloys.
The az31 alloy is one of the most popular magnesium alloys with aluminum. The need for lightweight materials, especially in the automobile industry, created renewed interest in innovative applications of magnesium materials. Magnesium alloys are mixtures of magnesium with other metals called an alloy, often. Development of mechanical properties in a cao added az31. Availability magnesium alloy az61a is available in extruded bars and sections, forging stock, extruded tubes and forgings. They are often anodized to enhance corrosion resistance. Chemical composition of az31 magnesium alloy mass fraction. The plastic shear deformation by the ecap causes accumulation of a large plastic strain and an increase of structural defects. Magnesium alloys design, processing and properties.
Download table chemical composition of az31 magnesium alloy mass fraction. Magnesium is a silverywhite metal which is used as an alloy element for zinc, lead, aluminum, and other nonferrous alloys. Magnesium alloy az31 mg96al 3zn 1 material information. Plastic deformation of the hexagonal lattice is more complicated than in cubic. Fe analysis is presented for az31 magnesium alloy and compared with the. Az31 magnesium az31b bar, rod, plate, extrusion, sheet. A comparative study has been carried out on az31 and az91 magnesium alloys in order to understand the electrochemical behavior in both alkaline and chloride containing solutions. Bicarbonate solution was used to produce conversion layers and its concentration significantly influenced the conversion layer formation and electrochem. For comparison, the performance of cafree az31 alloy samples with similar grain size was also investigated. Magnesium alloy az31 online catalogue source supplier.
The unusual texture observed in the studied az31 alloy is very probably a consequence of the small addition of ce, as it is documented in the chemical composition reported in table 1. Pdf a comparative electrochemical study of az31 and az91. Corrosion resistance of the biodegradable ze41 magnesium alloy. Number of scientific articles with terms az91 or az31 in the abstract. This research aims to estimate the impact fracture toughness of az31 magnesium alloy by finite element fe analysis. The magnesium used in microsofts surface book is actually more of a magnesium metal glass. The chemical composition of the asreceived az31 billet used in this study in mass percent is mg3. Due to its low mass density and good mechanical properties, this structural material offers considerable potential for the aircraft manufacturing industry. Twin roll casting has been used to produce az31 magnesium alloy strip. Modelling of superplastic forming of az31 magnesium alloy. Magnesium alloys are mixtures of magnesium with other metals called an alloy, often aluminum, zinc, manganese, silicon, copper, rare earths and zirconium. Magnesium alloys are light weight and feature superior machinability and ease of casting. We supply az31, az61, az80, and zk60 alloys, among others. Standard specification for magnesiumalloy extruded bars.
These alloys were manufactured in wrought condition and. Scientists and engineers for decades searched to utilize magnesium, known of its low density, for lightweighting in many industrial sectors. Az31 magnesium alloy is the most ductile and the most popular amongst az wrought alloys mgalzn group. A novel ionothermal strategy for developing a chemical converison film on. With the incorporation of the mgp coating, the corrosion resistance and bioactivity of magnesium alloys will be signi. It covers fundamental aspects of alloy strengthening, recrystallization, details of microstructure and a unique role of grain refinement. Contact sales for all magnesium stock and extrusion requirements.
The properties of az91d magnesium include three common. This alloy is a solutionhardened alloy with minimum precipitation. Better creep resistance than az91 at elevated temperatures but lower. Influence of accumulative roll bonding on the texture and. The az31 alloy is used in the aircraft industry to produce flat parts with ribs, such as brackets. We are the largest wrought magnesium distributor in the world. A film composed of crystalline mgoh2 and mgal layered double hydroxide ldh was successfully formed on az31 mg alloy, and its corrosion resistance was evaluated through. They melt the magnesium in an oxygen free atmosphere and then cool it so rapidly that no crystals can form. In vitro and in vivo evaluation of mgf2 coated az31 magnesium alloy. Why did microsoft choose magnesium for surface book. The microstructure and mechanical properties of az31. They are designated using the astm and sae system in which. Az31az81 magnesium alloys belong to wrought magnesium alloys while az91 belongs to casting magnesium alloy in commercial az series magnesium alloys. Microstructure and mechanical properties in an az31 magnesium alloy sheet.
An fe model of impact threepoint bending with three elastic bars is developed. The chemical composition of the tested az31 and az61 magnesium alloys is given in table 1. Magnesium az31b alloy is available in different forms such as plate, sheet, and bar. Zanotto f et al 2011 protection of the az31 magnesium alloy with cerium modified silane coatings. Az31b and az31c have the same nominal composition and differ only in. For this purpose, the microstructure, texture, mechanical properties and formability of az31 mg alloy samples containing 0. There are 412 suppliers who sells magnesium alloy az31 on, mainly located in asia.
Exact composition should be confirmed from reference standards. Etching magnesium plate magnesium alloy sheet az31 az31b. Dependence of fusion zone microstructures on secondphase particles l. Combined effect of composition and surface condition on corrosion. You can also choose from nonsecondary magnesium alloy az31, as well as from is alloy, nonalloy magnesium alloy az31, and whether magnesium alloy az31 is astm. The chemical composition of az31 magnesium alloys is shown in table 1. Most researchers who are studying the deformation behavior are focused on two kinds of alloys including az31 6 8 and az91 9 11 magnesium alloys. Introduction to magnesium alloys asm international. The grain structure changes of az31 magnesium alloy after two and four passes of ecap at 423 k and 523 k are presented in fig. It is an alternative to aluminum alloys as it has high strength to weight ratio. Surface treatments for magnesium alloys springerlink.
The size of the cast strip is 5mm thick and 250mm wide. The mechanical properties of magnesium alloys under dynamic loading have not been explored in sufficient depth. It is widely available when compared to other magnesium grades. Formability of az31 mg alloy sheets within medium temperatures. The thermal diffusivity of az61 displays the same trend, except it is. We supply offtheshelf rod, plate, bar, sheet and extrusions in all alloys and sizes. Evaluation of impact fracture toughness of az31 magnesium.
In addition, there is coverage of new and emerging applications. In this work, anodized magnesium alloy az31 with and without boiling water. Magnesium az31bf, extruded solid shapes categories. A comparative electrochemical study of az31 and az91. Effect of al content in the mgbased alloys on the composition and. This standard covers magnesium tooling plate of one grade and quality offered for sale for use in jigs, fixtures, gauges and other applications. It is flammable, so extreme care should be taken while performing this process. Properties of az31 magnesium alloy sheet produced by twin. A wide variety of magnesium alloy az31 options are available to you, such as 5000 series. Soft as it is, this alloy offers good combination of strength and ductility for structural application after deformation with severe reductions. E role of chemical composition in corrosion of aluminum alloys.
We proposed a novel and environmentally friendly coating method, that is, steam coating, for az31 mg alloy 25,26. Improvement of corrosion resistance of magnesium by. The plastic deformation and recrystallization behavior of the commercial magnesium alloys az31 and me21 were analyzed in a wide temperature range. P data of az31 magnesium alloy with nominal composition of mg 3 wt% al 1 wt% zn based on hot torsion 242526, hot compression 27 28293032. Influence of bicarbonate concentration on the conversion. Rare earth addition improves creep strength at elevated temperature. Camera chassis of a samsung nx1, made of magnesium alloy. Download table chemical composition of az31 and az61 alloys wt%. Using the conventional hyperbolic sine equation the flow stress dependence on temperature and strain rate was modeled. Az91 alloy is the most popular material among cast magnesium alloy due to relatively high strength, excellent corrosion resistance, and good castability. Az31 stents hereby were implanted into the common bile duct of rabbits for 6 months. Magnesium technology 2015 covers a broad spectrum of current topics, including alloys and their properties. Increase of the corrosion resistance of magnesium alloys in vivo can be achieved.
Magnesium alloy az31 mg96al 3zn 1 rod material information. Magnesium az 31b, ams 4382, ams 4376, ams 4375, ams 4377. Magnesium alloy az31b is available in plate, tooling plate, sheet, rod and bar. The properties of az91e magnesium include three common variations.
The asreceived billet possessed nearly equiaxed grains. Compression deformation behavior of az81 magnesium alloy. Magnesium alloys have a hexagonal lattice structure, which affects the fundamental properties of these alloys. Magnesium etching plate magnesium carving sheet az31. The morphology, structure, and composition of the films were charac. Studies jewish studies law library and information science, book studies. The az31 magnesium alloy sheets in fully annealed state after hot rolling with the thickness of 1. The following datasheet gives an overview of magnesium az31b alloy. Az31 magnesium sheet\plate magnesium alloys, the lightest metal structure material for engineering applications, have taken a great interest in the automotive, aerospace, weapons, electronic and other fields, because of their low density, high specific strength and stiffness, good damping characteristics, as well as excellent castability.
For more specific values, follow the links immediately below. Magnesium tooling plate is made to az31 composition shown in the chemical composition of magnesium tooling plate table below. Ldhs were prepared in deionized water only without adding extra salts in this novel method. The worlds largest stocking distributor of magnesium alloys. In addition, it has a moderately low electrical conductivity and a moderately low melting temperature. The open circuit potential ocp was examined in 1 m naoh and 3. It can have a moderately low tensile strength among magnesium alloys.
1093 1323 1409 943 36 1418 548 1400 312 374 281 361 821 1171 1063 1452 762 373 634 969 24 455 556 1538 780 1541 898 1576 391 259 579 64 217 992 1150 199 163 66 647 282 811 1459 98 290 641